This MM74HC240MTC buffer and line driver from Fairchild Semiconductor is used to amplify an analog or digital signal by driving the input to the transmission line. With a 3-state output, this is power management at its best. This line driver has an operating temperature range of -40 °C to 85 °C. This product comes in rail packaging to keep individual parts separated and protected. It has 8 channels per chip. This inverting device has a typical operating supply voltage of 2.5|3.3|5 V. Its minimum operating supply voltage of 2 V, while its maximum is 6 V.